Hi Markus, Thanks for the patches! On 01/23/2012 11:19 AM, Markus F.X.J. Oberhumer wrote: > Hi, > > I've prepared a small package that updates the LZO version in the Linux > kernel to LZO v2.06. > > Please get it from: > > http://www.oberhumer.com/opensource/lzo/download/Testing/linux-kernel-lzo-2.06.20120123.tar.gz > > As stated in the README, its main purpose is to allow easy benchmarking of the > latest LZO versions - these do feature some nice speed improvements, and while > I have done a lot of synthetic benchmarking I'm really very curious and > appreciate feedback on "real-world" performance numbers like usage in > btrfs and zram. > I will soon integrate them with zram and get some performance numbers. Thanks, Nitin > > http://www.oberhumer.com/opensource/lzo/ > > On 2012-01-18 16:05, Markus F.X.J. Oberhumer wrote: >> On 2012-01-13 01:28, Andi Kleen wrote: >>> Here's a slightly updated version of the BTRFS snappy interface. >>> snappy is a faster compression algorithm that provides similar >>> compression as LZO, but generally better performance. >> >> I'd like to note that the LZO version in the current Linux kernel is >> rather outdated - it seems to be based on the 2005 release. >> >> In fact the latest version LZO 2.06 does compress both slightly faster and >> better than snappy 1.0.4 when benchmarking the Calgary and Silesia >> compression corpus (tested with gcc 4.6 on Nehalem & Sandy Bridge). >> >> Furthermore please be aware that from a pure compression point of view >> snappy et al. are very close cousins of LZO (strictly byte-aligned LZ77) >> that mainly differ in implementation issues like using a table to >> number of branches - and indeed similar optimizations could be applied >> to any version. >> >> I'm not sure if there is an official kernel maintainer of LZO, but I'd >> offer to assist you updating to the latest version and eliminating >> any possible performance issues. > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
